Abstract
Abstract This effort reported a diamine ligand having an electron-pulling group in its conjugation plane. Its corresponding Cu(I) complex was analyzed and discussed by means of NMR, single crystal analysis, density functional theory calculation and photophysical measurement. It was found that this Cu(I) complex took a distorted tetrahedral coordination geometry whose onset electronic transition had a mixed character of metal-to-ligand-charge-transfer (MLCT). To suppress structural distortion of this MLCT excited state, this Cu(I) complex was immobilized into a polymer host using electrospinning method. Photophysical performance comparison between bulk sample, solution sample and composite samples indicated that polymer rigid framework could effectively suppress MLCT structural distortion, leading to emission blue shift, long emissive lifetime and improved photostability.
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